Question

1) The boiling point of pure water is 373k.Calculate the boiling point of an aqueous solution containing 18g of glucose in 100g of water.Molal elevation con?stant of water is ).52kkg mol -1 ?......

2)Why do doctors advice people to take less common salt?

3)Why is freezing point depression of 0.1m NaCl solution is nearly twice that of 0.1m glucose solution??

4)A normal freezing point of nitrobenzene(C6H5NO2) is 278.82k.A 0.25 molal solution of a certain solute in nitrobenzene causes a frezing point depression of 2 degree.Calculate Kffor nitrobenzene.

Answer 1

1- ans use the formula which is given in ncert text book for this question as - telta tb =kb×m and on place of put w2×1000/m2 solve according to given value